It’s ridiculous that Donald Trump’s immigration proposals — not so much a policy as empty words strung together and repeated — should have propelled him as far as they have. This confounding situation hit peak absurdity on Wednesday.
It started with Mr. Trump’s meeting with President Enrique Peña Nieto of Mexico, in Mexico City. It was surreal because Mr. Trump has spent his entire campaign painting Mexico as a nation of rapists, drug smugglers and trade hustlers who would have to pay for the 2,000-mile border wall that Mr. Trump was going to build. But instead of chastising Mr. Trump, Mr. Peña Nieto treated him like a visiting head of state at a news conference, with side-by-side lecterns and words of deferential mush.